Automatic stop mechanism for presses or the like.



w. 1. KENT. AUTOMAHC STOP MECHANISM FOR P RESSES OR THE LIKE.

APPLICATION FILED OCT. 28. 1912.

. .m. w@ m W Mu W m I t Gnu y m B P w N u m n a u I H mm a M W. n 8 HI.) 9 S 3 MO 1 T u n II. 1 ws .W. J. KENT. AUTOMATIC STOP MECHANISM FOR- PRESSES OR THE LUKE.-

APPLICATION FILED ocr. 28, 1912.

' Patented May 18, 1915.

2 SHEETS-SHEET 25 WITNESSES:

7 UNITED STATES WILLIAM" J. KENT, on NEW Yonx, N. Y. AUTOMATIO sToP mncn amsm roa rnnssns on rnnmxn.

To all whom it may concern I Be it known that I, WILLIAM J. KENT, citizen of the United States, residing in th:

borough of Brooklyn, county of Kings, city /pre'ss.

and State of New York, have invented certain new and useful Improvements in Automatic Stop Mechanism 'for'Prsses or the like, of which the following is a specification.

The present invention relates tosto mechanisms for presses, more .espe'cia y I metal working presses, and aims to'provide certain improvements therein. The invention aims toprovlde' an 1mproved mechanism for stopping a prem when.

an article upon which it operates, is not It is also an aim of the invention to provide a simple and efficient mechanism of this character.

The invention is shown as applied toe press for punching or swaging so-called nibs on toe-calks, which 'nibs are used in the process of fastening the calks to horseshoes.

In the accompanying drawings :-Figure 1' is a front View of so much of a press as is necessary for'illustration, showing the sto mechanism applied "thereto, and with t e parts in normalrunning position; Fig. 2 1s a partial View of Fig. '1 showingthe parts in a position wherein the mechanism has operated to stop the press; Fig. 3 is a horizontal sectionalview, and Fig. 4: is a vertical transverse sectional view of portions of the press and stop-mechanism; F 1g. 5 is a detail View of one of the parts; Fig. 6 is a View of the parts in the position shown in Fig 2, with parts broken away for clearne'ss. I

In said drawings, 10 indicates the of a press. This plunger'slides plunger guides "11', 11 and-is connected to a main s aft 12,

which latter isconnected to a driving shaft 13 through intermediate gears 14,- 15. In

the..form ofpress illustrated, the plunger is provided with a plurality of punches or dies 16,-l6 adapted to'swage projections or nib on piec'es ofgmetal by a succession of operations. As shown, the pieces are in the form of'a barlt), from which bar they are cut, as-

shown at 19, Fig. 3, after the swaging operation-is completed, by a cutter 20. fixed to the plunger 01'.- the press. .i-

. I Specification of Letters Patent. Patented May 18, 1915. Application filed October 28, 1912. Serial No. 723,270. i

- As shown, the bar intermittently fed between the dies by a suitable feed mechanism 21 connected to the main shaft 12 of the PATENT OFFICE.

The bar may, however, be fed by a pin 24 fixed to a projection 25'upon' the *bed of the press, and its pivoted end is somewhat rounded, as indicated at 26, in order that it may have a limited universal movement upon the pivot pin 24. .The arm 23 is in-fact so mounted that it may have pivotal movement in both a vertical and a horizontal plane. The opposite end of the arm 23 is preferably rounded and fits within a slot 28 in a slide-bar 29 slidably. mounted in a bracket 30 attached to the bed of the press. This slide-bar 29 is acted upon by a spr ng-pressed pin 31 which normally presses it to one side; to the right in the construction illustrated, see Figs. 2 and 3 of the drawing.

stop 32, which, when the slide bar is pressed to one side, as shown in Figs. 2 and 3, projects in the way of a trip lever 33 pivotally mounted upon the end of an arm or support 34 attached to the plunger 10 of the press, and normally held in horizontal position by a light spring 50.

When the bar 19 is not properly fed, one of the projections 18 on the bar will either fail to come in contact with the finger 22 on arm 23, or a projection which does come in contact with the finger will fail to push the arm 23 over (to the left in Fig. 3) sufliciently to enable the arm to push the pro ection or stop 32 on the slide-bar 29 out of the line of movement of the trip-lever 33. The consequence of this will be that, as the press-plunger nears the limit of its upward movement, one end of the trip-lever will be brought into contact with the projection 32 and its other end into contact with a projection 35 upon a lever 36. Further upward movement of the plunger will thereupon cause the trip-lever 33 to turn and lift the I The slide-bar 29 carries a projection or pressed pin 3!, and thereby moving the pro- 1 lever 36. The lever 36 is pivoted at 37 and is provided at one end-with notches 38, 39, into which a clutch-lever 40 pivoted at 41 and operating a clutch 42 or other suitable means for throwing the press into and out of operation, is adapted to engage. The clutch-lever preferably has attached thereto one end of a spring 43, which spring normally pulls upon the arm 40 in a direction to unclutch the clutch. The other end of the spring 43 is attached to a bracket 44 fixed upon the press. In running condition the clutch-lever 40 is normally engaged in the notch 38.01 the lever 36. Consequently when the lever 36 is lifted at one end by the triparm the. notched end of the lever 36 is depressed, thereby disengaging the clutchlever 40, which is slidably mounted in a slottedbracket '42 fixed upon the press, from the notch 38, whereupon the clutch-lever 40 ispulled over by the spring 43 so as to unclutch the clutch and stop the machine. The clutch-arm 40 may be provided with an operating handle 41, which handle may .be jointed so that it may normally hang down out of the way.

The sto TONI" of the machine mav be has- .L D .1

tened by, means of a brake 45 connected to the eliitch and operated by the clutch-arm 40.

The projection .35 upon lever 36 may be adj ustably mounted thereon so that the ac tion of thetrip-lever 33 upon thelever 36 may be timed. For this purpose the lever 36 is provided with a slot 35 in which the projection 35 is adapted to be fastened.

The lever 36 is provided at either end with a handle 46, so that the clutch-arm 40 may be disengaged from the notch 38 by manually pressing down upon or lifting one of the handles of the lever 36. A spring 48 is provided for lilting the notched end of the lever 36 into engagement with the clutcharm 40. The weight of the lever 36 upon one side of its pivot may be relied upon for this purpose, but a spring is provided for making the action more positive.

\Vhen the bar upon which the press operates is-properly fed. and has been given its full movement, the projection 18 in engagement with the finger 22 gives the arm 23 a full movement. see Fig. l, pressing the slide bar 29 against the pressure of the spring jection 32 out of the path of the trip-arm 33. (onsequently the trip-arm 33 upon the upstroke oi the plunger fails to strike against the projection 32 and isthoreby not thrown upwardly against the projection 35 on the lever 36.. but contacts with the projection 35 on lever 36 and idly turns on its pivot against the light pressure of the spring 50. The lever 36 therefore remains in its normal position and is not caused to release the clutch-arm 40. The plunger 10 thereby completes its upward movement and bar 19 with which it is in contact.

stopping of the press is continues its cycle'o'f operation without having its downward course arrestedl he underside of the plunger 10 of the press is provided with a stud 52, which upon the downward s roke of the plunger, hits against the heel o of the arm 23 and lifts it, as shown in the dotted line position in Fig. 4, thereby lifting the finger 22 from engagement with the projection 18 of It pe 1e arm 23 is then pushed over while it is in its lifted position by the spring pressed pin 31 and dropped into position to be engaged by va succeeding projection 18 on bar 19 at a succeeding feeding operation, when the pro jection 52 moves out of engagement with the heel 53 of the arm upon the upward movement of the press-head. The dropping of the arm, 23 may be rendered more positive by means of aspring 54 bearing on the underside of the heel 53.

lVhile I have shown my invention as applied to one form of press, it is not to be understood to be confined thereto, but may be applied to many forms of presses, and

while I have illustrated and described but one embodiment of the stop mechanism, the

invention is not to be understood as confined thereto, as many modifications therein may be made without departing from the spirit of the invention. .l urthermore, ,while'the mechanism has been shown as operating upon a bar from which the articles are subsequently cut, the mechanism may operate upon articles in other forms, as in a separated state.

'VV hat is claimed is 1. Apress having means for stopping it,

a part moving in unison with. the press plunger and. tending to operate said stopping means, and means adapted to contact with the work fed to the press, and when displaced thereby, to render said part moving in unison with the press plunger inoperative to affect said stopping means, whereby the prevented when the work is properly fed.

2. A stopping mechanism for presses,

comprising a clutch, means adapted to throw said clutch into and out of operation, said means operating normally to maintain said clutch in operation, a part adapted to move in unison with the press plunger and tending to operate said means to throw said clutch out of operation, and means adapted to contact with the work fed to the press and when displaced thereby, to render said part moving inunison with the press plunger inoperative to affect said clutch operating means, whereby the stopping of the press is prevented'when the work is properly fed.

3. A press having means for stopping it, and an arm for, operating said stopping means, said means being normally in a position to operate the press, means adapted to m caw placed thereby'to render the same part mor mg m unison with the plunger, inoperative to affect said arm, whereby the stopping of the press is prevented when the press is I properly fed. 3 l

4, A press "havihgimeans for I stdpp'ing' it,

apart movingiin unison with the press plunafiect said stopping means,

ger and ten ng to operate said stopping means, and means adapted to contact with the work fed to the ress, comprising a stop, ada ted when disp aced. by said, work, to

rein er said part moving in unison with the press plunger inoperative to affect said stop- 1 press is pingmeans, whereby the stopping of the prevented when the work is properly fed. v

5. A press having means for stopping it,a part moving in unison with the press plunger and tending" to operate said stopping means, and means adapted to contact with the work fed to the press, comprising a spring-pressed stop normally pressed into. position to render saidwpait moving in unison with the plunger operative to afiectzsa'id stopping means, and adapted when, displaced by said work, to render said part moving in unison with the press 'plun'gerinoperative to" afi'ect said stopping means, whereby the stopping of the press is prevented when the work is properly fed.

6. A press having means for stopping it, a part moving in unison with the press plunger and tending to operate said stopping means, an arm having a part adapted to contact with the. work fed to the press, and a sto said armwhen displaced by said work, moving'said stop to render said part moving in unison with the press plunger inoperative to affect said stopping means,

whereby the stopping of the press is pre vented when the work is properly fed.

7. A press having means for stopping it, a part moving in unison with the press plunger and tending to operate said stopping means, an arm having a limited universal movement and having a part adapted to con tact with the work fed to the press, and a stop, said arm when displaced by said work,

' moving said stop to render said part moving in unison with the press plunger inoperative to affect said stopping means, whereby the stopping of the press is prevented when the work is properly fed.

8. A press having means for stopping it, a part moving in unison with the press plunger and tending to operate said stopping means, means adapted to contact with the work fed to the press, and when displaced thereby, to render said part moving in unison with the press plunger inoperative to affectsaid stopping means, whereby the stop'- W01 and means adapted to engage an artlcle fed to the press and when disger and ten g. tbioperate sai means, means adapted to contact with theft. work :t'ed to the press, and when l displaced 'thereby, torender said part moving in unifor moving said stop out of positio 6f the press is prevented when the is properly fed, and means for timing.

.thefaction of said part moving in unison with the plunger onsaid stopping means.

9. A press having means for stoppin it,

a partmovf in unison with the sonwith the press plunger ino rative to v stopping of the pres is prevented when the work is properly fed, an means for'movin said work-contacting part'from contact w ereby the work to a position to contact with ing work. 10. A stop mephanism forp -'com-'-{ I prising means adapted to throw the lntoand out of operation, an arm for oper-z atingsaid means, means for retainingsaid. v arm 1n pos1t1on to hold said first named means in running position, and mechanically operating means having a part 'ada ted to engage an article fed to thepress or controlling the release of said arm by said retaining means.

.-;; 11. A stop'mechanism for presses, com- '--:prisi;ng means adapted to throw the press -.-,into"and out of operation, a springretracted arm for operating said means, means for retaining said arm in position to hold said first-named means in running positlon, and

mechanically operating means having a part said armby" said retaining means. J

adapted to engage an article "fed to the pressfor controlling the release of 12. A stop mechanism for presses, comprising means adapted to throw the press 166 into and .out of operation, an arm for operating said means, means for retaining said arm in position to hold said first-named means in running position, means ada ted to movein unison with the plunger 0 the press for releasing said arm from said retaining means, and means ada ted to en age an article fed to the {mess or contro ling the operation of sai releasing meansv 13. A stop mechanismfor presses, coml prising means' adapted to throw the press into and out of operation, an arm for operating said means, means for retaining said arm in position to hold said first-named means in running position, means adapted to move in unison with the plunger of the press for releasing said. arm from said retain'ing means, a stop adapted to operate said releasingmeans, and mean's 'adapted to engage an article tobe fed to the'press ating said means, means for retaining said arm in positionvto hold said first-named means in running position, means adapted to move in unison with the plunger of the press for releasing said arm from said retaining means, a spring-pressed stop nor- -mally pressed 'into position to operate said releasing means, and means adapted to en-v gage an article to be fed to the press for moving said stop out of position to operate said releasing means when an article is properly fed.

15. A stop mechanism for presses, comprising means adapted to throw the press into and out of operation, an'arm for operating said means, means for retaining said arm in' position to hold said first-named means in running position, means adapted to move in unison with the plunger of the press for releasing said arm from said retaining means, a stop adapted to operate said releasing means, and an arm adapted to engage an article fed to the press for moving said stop out of position to operate said releasing means when the article is properly fed.

1(3. Astop mechanism for presses, comprisingemeans adapted to throw the press into and out, of operation, an arm for operating said means, means for retaining said arm in position to hold said first named means in runningposition, means adapted to move in unison with the plunger of the press for releasing said arm from said retaining means, a stop adapted to operatesaid releasing means, and an arm having a projection thereon adapted to engage an article fed to the press for moving said stop out of position to operate said releasing means when the article is properly fed.

]Z'. A stop mechanism for presses, comprising means adaptcd to throw the press into and out of operation, 'an'arm for operating said means, means for retaining said arm in position to hold said first-named means in'running position, means adapted to move in unison with the plunger of the press fonrclcasi-ng said arm from said retaining means, a stop adapted to operate said releasing means, and an arm having a limited universal movement adapted to engage an article ted to the press for moving said stop out of position'to operate said rclfcaising means when the article improperly 18. A stop mechanism for presses,-comprising means adapted to throw the press into and out of operation, an arm for operating said means, means for retaining said arm in position to hold said first-named means in running position, means adapted to more in unison with the plunger of the press for releasing said arm from said rcmining means, means adapted to engage an article fed to the press for controlling the operation of said releasing means, and means for timing the'action of said releasing means on said retaining means. r

19. 'A stop mechanism for'presses, comprising means adapted to throw the press into and out of operation, an arm 'for- 0pcrating said means, a notched lever for retaining said arm in position to hold said means in running position, a trip lever adapted to move in unison with the plunger of a press, a stop normally pressed into position to engage said trip lever to cause the press for releasing said arm fromsaid retaining means, a "stopadapted to operate said releasing means, an arm adapted to engage an article fed to the press for moving said stop out of position to operate said releasing means when the article is properly fed, and means adapted to move said arm from cngagci'nent with one article to a position to engage a succeeding article.

21. A stop mechanism for presses, comprising means adapted to throw the press into and out of operation, an arm for oper- I ating said means, means for retaining said arm in position to hold said first-named means in running position, means adapted to move in unison with the plunger-of the press for releasing said-arm from said retaining means, a stop adapted to operate said releasing means, an arm adapted to engage an article fed to the press foxmoving said stop out of position to operate said releasing means when the article is properly fed, a projection carried by thehead of the press adapted to lift said arm out of engagement wvith an article, and a spring adapted to press said arm into position to engage a succeeding article.

22. In stop mechanism for presses, a lever moving with the press-plunger, a stop movable into and out of operative relation with said lever, said stop being moved by the work, and means for stopping said press,

said means being actuated by said lever upon coming into contact with said stop;

A'press, a clutch, and means for operating said clutch, a reciprocating part adapted to operate said clutch-operating means, and an arm having a sustautially universal movement and having a work contacting part, said arm being. movable in one plane to control the operation of said reciprocating part on said clutch-operating means, and movable in another plane to move out of enga ement with'the Work.

In witness w ereof, I have hereunto signed iny name inthe presence of two subscribing witnesses.

I WILLIAM J. KENT.

Witnesses:

GUSTAVE R. THOMPSON, FRED WHITE. 

